/Engine/Source/Runtime/Engine/Public/AudioStreaming.h
Gets a pointer to a chunk of audio data
a handle to the loaded chunk. Can return a default constructedFAudioChunkHandleif the chunk is not loaded yet.
virtual [FAudioChunkHandle](API\Runtime\Engine\FAudioChunkHandle) GetLoadedChunk ( const FSoundWaveProxyPtr & SoundWave, uint32 ChunkIndex, bool bBlockForLoad, bool bForImmediatePlayback ) const